i know that fluid resistance varies with the square of speed. (to go twice as fast requires 4 times the power, 3 times as fast requires 9 times the power)

but i'm looking for a corolation between air and water resistance. i know that besides the fact that water fills a vessel to a level and air fills a vessel to an even pressure, there's virtually no differene in their behaviours. water is esentially VERY thick air.

can anyone find a relationship between the power required to travel a certain speed through air vs the power required to travel the same speed through water?

i'm looking for a website that i can reference for a report, thanx.
i'll pay out to the first user that posts a link that i end up using in my report.
payment to be made before or after reset, your choice

speedfreak227

11-23-2005, 07:58 PM

Timmetie

this is not doable by only taking the pressure into account? for thats essentially the only difference between the 2?

nah ignore me, im probably babling away :)

11-23-2005, 08:44 PM

MIMIK

The relation is approximately the density ratio (air density/water density).

Quote:

Originally Posted by speedfreak227

i know that fluid resistance varies with the square of speed. (to go twice as fast requires 4 times the power, 3 times as fast requires 9 times the power)

but i'm looking for a corolation between air and water resistance. i know that besides the fact that water fills a vessel to a level and air fills a vessel to an even pressure, there's virtually no differene in their behaviours. water is esentially VERY thick air.

can anyone find a relationship between the power required to travel a certain speed through air vs the power required to travel the same speed through water?

i'm looking for a website that i can reference for a report, thanx.
i'll pay out to the first user that posts a link that i end up using in my report.
payment to be made before or after reset, your choice

speedfreak227

11-23-2005, 10:15 PM

speedfreak227

Quote:

Originally Posted by MIMIK

The relation is approximately the density ratio (air density/water density).